Water boiler particularly for locomotives and locomobiles



u. BARSKE 1,795,537

March 10. 1931.

WATER BOILER PARTICULARLY FOR LOCOMOTIVES AND LOCOMOBILES Filed Dec. 4. 1929 s Sheets-Sheet 1 U. BARSKE March 10, 1931.

WATER BOILER PARTICULARLY FOR LOCOMOTIVES AND LOCOMOBILES Filed Dec. 4. 1929 3 Sheets-Sheet 2 f o O O O O O O O O oooo at WWW U. BARSKE- 'March 10; 1931.

WATER BOILER PARTICULARLY FOR LOCOMOTIVES AND LOCOIOBILES Filed Dec. 4. 1929 3 SheotrSheet 3 Patented Mar. 10, 1931 UNITED STATES PATENT OFFICE ULRICH BARSKE, OF I-IANOVER-RICKLINGEN, GERlrIANY, ASSIGNOR TO HANNOVEBSGHE MASCHINENBAU-ACTIENGESELLSCHAFT, VORIVIALS GEORG EGES'IORFIE, OF HANO- VER-LINDEN, GERMANY WATER BOILER PARTICULARLY FOB- LOCQIEEOTIVES AND LOGOMOIBIiLES Application filed December 4, 1929, Serial No. 411,546, and in Germany May 26, 1928.

In locomotiveand water-tube boilers it is known to fit the space forming theboiler barrel and the firebox with straight inclined water tubes.

This invention has for its object, to con-- struct this type of boiler, in which the best imaginable efiiciency is obtained with the smallest space requirement, so that it can be cleaned and maintained in the simplest manner and can be changed over without special alterations for working wit-l1 one or more pressure stages, with or without superheating or in any other suitable manner.

This is attained in that the absolutely straight inclined tubes forming the boiler are fixed stationary but easily removable at one end and mounted individually axially shiftable at the other end, the connection to the waterand steam-collecting chambers respectively is effected by separate connecting tubes, the connect-ion of which is obtained by lensshaped packings or equivalent means. The position of the individual inclined tubes, which, for the purpose of facilitating the 7 manufacture and storing, are preferably of the same diameter, irrespectively whether they are to conduct water, steam or a watersteam mixture, is ensured by loosely guiding the tubes at one end in suitable bores in the rear wall of the firebox, and mounting the same at the other end in vertical or horizontal rows on the smoke box or in bars which are grooved, so that the tubes extending through the gaps formed between two bars can easily be exchanged. This makes it also possible for the heating gases, to pass through without encountering considerable resistance.

In order to be able to easily exchange the inclined tubes, the ends of the tubes on the wall of the firebox are constructed so that they can be drawn through holes in the rear wall of the firebox together with the elements, for example flanges, necessary for the packed connection with the connecting tubes. The inclined tubes are steamtight connected on the smokebox bars with the connecting tubes in such a manner, that the packing parts hold at the same time stationary one or both tubes on the bar. As the connecting tubes are only of small diameter, the inclined tubes can also be considerably reduced at both ends thereby enabling the width of the bars to be kept as small as possible, and the parts necessary for establishing the steamtight connection are made of such small diameter that the tubes can be pulled through the gaps between the fastening bars.

By these arrangements it is possible, to also render all or individual inclined tubes available for other purposes than for water evaporation, for example for the superheating of steam in the first or second stage or the like, in that the inclined tubes are connected with other collectors merely by re versing the connecting tubes. Thus individual tubes can be used solely for heating purposes, for example in cold weather.

Several embodiments of the invention are illustrated by way of example in the accompanying drawing in which:

Fig. 1 shows a longitudinal section of a locomotive boiler.

Fig.2 is a cross-section through the smokebox,

Fig. 3 shows a cross-section through the inclined tube boiler. b'Fig. 4 is a cross-section through the fire- Figs. 5 and 6 are longitudinal sections showing two'forms of construction of the fitting of the inclined tubes, their fastening on the bars and the connection with the connecting tubes.

' The boiler is formed of inclined tubes 1, which extend through the available space frornthe rear wall 2 of the firebox 4 to the smokebox 3, whereas the side walls of the firebox 4: are covered in longituidnal direction with similar but correspondingly shorter tubes 5. For the purpose of conducting the heating gases the tubes are enclosed by a jacket 6, the inside of which is preferably covered with a heat protecting substance, such as chamotte 7 asbestos or the like. The inclined tubes 1 and 5 are absolutely straight and fastened, easily detachable, in the manner which will be hereinafter described, onto orin bars 8 on the smokebox, whereas the tnbeson the ,sidelof the-firebox loosely project s'ngly through holes 9 in the rear wall of the firebox. The connection of the inclined tubes with the waterand steam-collecting chambers 10 and 11 respectively is effected by separate connecting tubes 12 and 13 respectively so that the tubes may be easily interchanged. It is immaterial for the invention, in which manner the circulation of the boiler water is closed; preferably however a top drum will be used as illustrated in Figs. 1 and 1.

As shown in Figs. 5 and (5 the packing connection ot the inclined tubes with the connecting tubes is effected by-lens-shaped packings let. In order to enable pulling out of the tubes through the holes in the rear wall 2 of the firebox-tor interchanging, tubes are used, according to the invention, the ends of which are reduced to such a diameter that their packing flanges 15 can be drawn through the bores 9 in the fireboxwall. The

inclined tubes on the smokebox are likewise connected to the connecting tubes 13 by lensshaped packings 1%, the flanges 1G or 17 necessary for obtaining the tight connection servat the same tnne to glve a stationary bear-' i11 ing to one or both tubes as shown by the fixing bolts 18 and 19 respectively. in order to be able to exchange the inclined tubes leading to the sn1okebox,tl1e bars 8, to which the hori zontal or vertical rows of inclined tubes are fastened, are made as thin as'possible, so as to allow ofthe passing of t-he'tubes through the gaps between every two bars. For this purpose the ends of the inclined tubes are re due-ed towards the smokebox to the smallest further gaps 20 are formed between every:

two juxtaposed bars, through which gaps the inclined tubes can be interchanged after the packing connection has been loosened.

Accordingto the kind of firing and the construction smoke deflecting walls 2l-may,if necessary, be-arranged at a suitable point between the tubes, as shown for examplein' Fi n 1, or the inclined tubes may be inclined in the opposite direction so that their highest point lies near the hottest zone, and the the gases flow in counter direction to the water the firebox, a detachable connecting tube for each end of the inclined tubes',-an'cl collector chambers to which with said inclined tubes are connected by said connecting tubes.

2. A. water-tube boiler as specified in claim 1, comprising in combination with the inclined tubes; bars'in said smoke box in which saidinclined tubes are mounted in rows, a packing connection between the rear connecting tubes and said inclined tubes adapted to hold one or b oth'tubes stationary on said bars.

3. A water tube boiler as specified in claim 1, in which the inclined tubes have reduced ends to tacilitate'connection with the carrying bars andjuxtaposed to each other, said barsbeing cut-outon the two sides to provide spaces through which said inclined tubes can be removed. I

4;. A'water tube boiler as specified in claim 1, comprising in combination with the inclined tubes having reduced ends the said connectingtubes being of smaller diameter than the inclined tubes, a firebox having bores in the rear wall through which said inclined tubes areloosely inserted, and flanges on the ends of said inclined tubes serving as packing means for the connection with said connecting tubes and adapted to be passed through said bores.

In testimony whereof I affix my signature.

ULRICH BARSKE. 

